Page 1400 of 1640
Gauge Assembly
Bulb Locations
SRS INDICATOR LIGHT (1.4W)
EPS INDICATOR LIGHT (1.4 W)
RIGHT TURN SIGNAL INDICATOR LIGHT (1.4 W)
BRAKE SYSTEM LIGHT (1.4W)
SEAT BELT REMINDER LIGHT (1.4W)
TCS-OFF INDICATOR
LIGHT (1.96 W)
LOW FUEL INDICATOR
LIGHT (1.4W)
GAUGE LIGHT
(1.4W)
GAUGE LIGHT
(3.0W)
CRUISE LIGHT
(1.96W)
GAUGE LIGHT
(3.0W)
TCS ACTIVATION
INDICATOR LIGHT
(1.96
W)
GAUGE LIGHT
(3.0W)
GAUGE LIGHT
(1.4W)
LOW OIL PRESSURE
INDICATOR
,LIGHT(1.4W)
MALFUNCTION
INDICATOR
LAMP (MIL)
(1.4W)
CHARGING SYSTEM LIGHT (1.4 W)
ABS
INDICATOR LIGHT (1.4 W)
LEFT TURN SIGNAL INDICATOR LIGHT (1.4 W)
TCS INDICATOR LIGHT (1.4W)
HIGH BEAM INDICATOR LIGHT (1.4W)
GAUGE LIGHTS (1.4W x 2)ProCarManuals.com
Page 1460 of 1640
SEC
&
PAGE
NOTES
11-112
11-84
11-125
11-128 11-135
23-89
11-134
6-54 ('91-'93) 11-4,
97
11-4
23-94 8-4
8-5
23-107
10-2, 3
10-5
13-3
14-94 ('91-'93)
R = Replace I = Inspect After inspection, clean, adjust, repair or replace if necessary.
Check oil and coolant level at each fuel stop.Under severe driving conditions, service these items more often. For cars sold in California, this service is recommended only; other areas, it is required.
Replace every 6 years or 60,000 miles (96,000 km), whichever comes first.
Tension adjustment only.
Thereafter, replace every 2 years or 30,000 miles (48,000 km), whichever comes first.ProCarManuals.com
Page 1464 of 1640
Component Locations
Index
FRONT KNOCK SENSOR
Troubleshooting, page 11-62
COOLANT TEMPERATURE (TW) SENSOR
Troubleshooting, page 11 - 48
EGR VALVE
Troubleshooting,
page 11-128
FUEL PUMP RESISTOR
Inspection, page 11-106
CRANK/CYL SENSOR
Troubleshooting, page 11-46
CONTROL BOX
page 11-6 THROTTLE
ANGLE
SENSOR
Troubleshooting,
page 11-50
FAST IDLE VALVE
Inspection, page 11-83
EACV
Troubleshooting,
page 11-70 INJECTOR
RESISTOR
Testing, page 11-94
FRONT HEATED
OXYGEN (O2) SENSOR
Troubleshooting, page 11-32
INTAKE AIR TEMPERATURE
(TA) SENSOR
Troubleshooting, page 11-52
REAR KNOCK SENSOR
Troubleshooting, page 11 -62
REAR HEATED
OXYGEN (O2) SENSOR
Troubleshooting, page 11 -32
MAIN RELAY
Relay Testing, page 11-104
Inspection, page 11-105
ELECTRONIC CONTROL UNIT (ECU)
Troubleshooting, page 11-26
FUEL PUMP RELAY
Inspection, page 11-99ProCarManuals.com
Page 1465 of 1640
Component Locations
Index
THROTTLE CABLEInspection/Adjustment, page 11-113
Installation, page 11-113
THROTTLE BODY
Inspection, page 11-114
Disassembly, page 11-116
AIR CLEANER
Disassembly,
page 11-112
AIR INTAKE
DUCT
FUEL PUMP
Troubleshooting, page 11-99
Testing, page 11-102
Replacement, page 11-102
FUEL FEED PIPE
FUEL CUT VALVES FUEL FILTER
Replacement, page 11-97
PRESSURE REGULATOR
Testing, page 11-95
Replacement, page 11-96
TWO-WAY VALVE
Testing, page 11-140
FUEL RETURN PIPE
FUEL FILLER CAP
CHARCOAL CANISTER
Troubleshooting, page 11-137
FUEL INJECTORS
Troubleshooting,
page 11-89
Replacement, page 11-92
FUEL PIPE
FUEL TANK
Replacement,
page 11-108
FUEL VAPOR HOSEProCarManuals.com
Page 1466 of 1640
System Description
Vacuum Connections
CONTROL
BOX
page 11-6
PURGE CONTROL
DIAPHRAGM
CHARCOAL
CANISTER
TO TWO-WAY
VALVE
CHAMBER
VOLUME
CONTROL
DIAPHRAGM
DASHPOT
DIAPHRAGMEGR VALVE FRONT OF
VEHICLE
EGR VALVE LIFT SENSOR
FUEL PRESSURE
REGULATOR
(cont'd)ProCarManuals.com
Page 1468 of 1640
CHECK VALVE
AIR CHAMBER
CHAMBER VOLUME CONTROL SOLENOID VALVE
CHAMBER VOLUME CONTROL DIAPHRAGM
PCV VALVE
EGR VALVE
CONSTANT VACUUM CONTROL (CVC) VALVE
EGR CONTROL SOLENOID VALVE
CHARCOAL CANISTER
PURGE CUT-OFF SOLENOID VALVE
PURGE CONTROL DIAPHRAGM VALVE
TWO-WAY VALVE
FRONT OXYGEN (O2) SENSOR
REAR OXYGEN (O2) SENSOR
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
ELECTRONIC AIR CONTROL VALVE (EACV)
FAST IDLE VALVE
AIR CLEANER
FUEL INJECTOR
PRESSURE REGULATOR
FUEL FILTER
FUEL PUMP
FUEL TANK
DASHPOT DIAPHRAGM
DASHPOT CHECK VALVEProCarManuals.com
Page 1480 of 1640
PGM-FI Control System
System Description
INPUTS ELECTRONIC CONTROL UNIT OUTPUTSCRANK/CYL SensorsMAP Sensor
TW Sensor
TA Sensor
Throttle Angle Sensor Oxygen SensorsEGR Valve Lift Sensor
Vehicle Speed Sensor
Ignition Timing Adjuster
Knock Sensers
A/T Fl Signals
TCS Signals
Starter Signal
Alternator FR Signal
Air Conditioning Signal
A/T Shift Position Signal M/T Neutral Switch Signal
M/T Clutch Switch Signal
Battery Voltage (IGN. 1)
Fuel Pump Terminal Voltage
VTEC Oil Pressure Switch
Signals
Injector Timing and Duration
Electronic Idle Control
Other Control Functions Ignition Timing Control
ECU Back-up Functions Injectors
Main Relay (Fuel Pump)
Fuel Pump Relay
Check Engine Light
EACV
A/C Compressor Clutch Relay
Igniter Unit
Purge Cut-Off Solenoid Valve
EGR Control Solenoid Valve
Chamber Volume Control Solenoid Valve
Radiator Fan Relay
Engine Compartment Fan Relay
VTEC Spool Valves
TCS Control Signals
Injector Tinning and Duration
The ECU contains memories for the basic discharge durations at various engine speeds and manifold pressures. The
basic discharge duration, after being read out from the memory, is further modified by signals sent from various sensors
to obtain the final discharge duration.
Electronic Air Control
Electronic Air Control Valve (EACV)
When the engine is cold, the A/C compressor is on, the transmission is in gear (A/T only) or the alternator is charging, the ECU
controls current to the EACV to maintain correct idle speed.
Ignition Timing Control
The ECU contains memories for basic ignition timing at various engine speeds and manifold pressures. Ignition timing
is also adjusted for coolant temperature.
A Knock Control System is also used. When detonation is detected by the knock sensor, the ignition timing is
retarded.
Other Control Functions
1. Starting Control
When the engine is started, the ECU provides a rich mixture.
2. Fuel Pump Control
When the ignition switch is initially turned on, the ECU supplies ground to the main relay which supplies current to
the fuel pump for two seconds to pressurize the fuel system.
When the engine is running, the ECU supplies ground to the mam relay which supplies current to the fuel pump.
When the engine is not running and the ignition is on, the ECU cuts ground to the main relay which cuts current
to the fuel pump.
Excellent engine performance is achieved through the use of VTEC (Variable Valve Timing and Lift Electronic Con-
trol System), intake manifold chamber control and discharge volume control of the fuel pump.
3. Fuel Cut-off Control During deceleration with the throttle valve closed, current to the injectors is cut off to improve fuel economy at
speeds over 1,500 rpm.
Fuel cut-off action also takes place
when
engine speed exceeds,
8,300
rpm, regardless
of the
position
of the
throttle valve, to protect the engine from over-revving.ProCarManuals.com
Page 1500 of 1640
Fuel Supply System
System Troubleshooting Guide
NOTE: Across each row in the chart, the systems that could be sources of a symptom are ranked in the order they should be inspected starting with . Find the symptom in the left column, read across to the most likely source, then
refer to the page listed at the top of that column. If inspection shows the system is OK, try the next most likely system
,
etc.
PAGE
89
94
95
97
98
103 106
*
ProCarManuals.com
